If you’re in Aubrey today, you already know it’s brutal out there. With the heat advisory pushing the heat index to 104°, your air conditioner is working harder than it has all year — running longer cycles, pulling more moisture out of the air, and putting more strain on parts that quietly fail without warning. One of the most common: the AC condensation drain line.
Here’s the thing about a condensation leak — it rarely announces itself with a dramatic gush. It’s a slow drip, tucked inside a wall cavity or above a ceiling, doing damage for days before anyone notices a stain. And on a day like today, with the system running nearly nonstop, that slow drip has a lot more opportunity to become a real problem.
So before you do anything else this afternoon, take five minutes and check these things. It’s the kind of five minutes that saves you a much longer week.
Why heat advisories are prime time for AC drain failures
Your AC doesn’t just cool the air — it pulls humidity out of it, and that moisture has to go somewhere. It collects in a drain pan and exits through a condensation line, usually a thin PVC pipe running out near your foundation or into a drain.
On a normal day, that system handles a manageable amount of water. On a 104° day, with the unit running almost continuously to keep up, it’s processing far more condensation than usual. If there’s already a partial clog — algae, dust, a bit of sludge buildup — today is the day it finally backs up and overflows.
Your 5-minute checklist, right now
- Look at the drain pan. If you have an indoor unit in a closet or attic, check the pan underneath it for standing water.
- Check the drain line outside. Find where the condensation line exits your house (often near the outdoor unit) and confirm water is actually dripping out. No drip during a heavy-run day like today is a red flag — it likely means a clog upstream.
- Look up. If your air handler is in the attic, check the ceiling below it for any new discoloration, soft spots, or a faint musty smell.
- Check around vents and the unit itself for any dampness, drips, or a puddle that wasn’t there yesterday.
- Listen for your float switch. If your system suddenly shuts off entirely, don’t panic — that may actually be a safety switch doing its job, stopping the unit before an overflow gets worse. It’s uncomfortable, but it beats the alternative.
If you find standing water or a stain, turn off the AC at the thermostat and, if you’re comfortable, at the breaker. Yes, it means an uncomfortable house on a 104° day. That’s a real trade-off, and I won’t pretend it isn’t. But letting the unit keep running while it’s actively overflowing can turn a small, contained issue into water working its way through drywall, insulation, and framing — which is a much bigger job than anyone wants.
What happens if water’s already gotten into the structure
If you’ve caught actual damage — a stained ceiling, damp drywall, a soft spot underfoot — the surface being dry to the touch doesn’t mean the structure underneath is dry. That’s one of the most common myths in this business, and it’s the reason small leaks turn into mold problems weeks later. Moisture hides in places you can’t see or touch, and that’s exactly where trouble grows.
This is where a proper inspection matters — checking moisture content in the material itself, not just what’s visible on the surface, so you know the true extent before it’s a bigger, more expensive fix.
We’re here for it, Aubrey
Merlene Mitigation is based just up the road in Pilot Point, and we handle water damage and inspections all across North Texas — Aubrey included. Josh is the one who answers the phone and the one who shows up, so you’re not getting bounced between a call center and a rotating crew. Lower overhead means fair pricing, and one accountable person means nothing gets lost in translation.
If you’re seeing signs of an AC leak today, give us a call or shoot a text — Josh is usually on-site within the hour for situations like this, and texting works great if a phone call isn’t convenient in the moment.
And if nothing’s leaking today but you’d rather be ready than sorry, we put together a free guide called The First 24 Hours After Water Damage. It walks through exactly what to do the moment you find water, before help arrives — worth having on hand long before you ever need it.
Stay cool out there, Aubrey.
-Ally
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